National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Fair

23°F

-5°C

Humidity 96%
Wind Speed Calm
Barometer 30.32 in (1027.1 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 9 Jan 3:56 am EST
Extended Forecast for

South Dennis MA

  • Today

    Today: Patchy fog between 8am and noon. Patchy freezing fog before 8am. Otherwise, partly sunny, with a high near 46. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph.

    High: 46 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog then
    Partly Sunny

  • Tonight

    Tonight: Showers likely, mainly between 10pm and 2am. Patchy fog. Otherwise, cloudy, with a low around 37. South wind 7 to 13 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: Rain likely, mainly after 5pm. Patchy fog after 4pm. Otherwise, cloudy, with a high near 45. Northwest wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Mostly Cloudy
    then Rain
    Likely and
    Patchy Fog

  • Saturday Night

    Saturday Night: Rain. Patchy fog before 8pm. Low around 35. East wind 3 to 6 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Rain and
    Patchy Fog

  • Sunday

    Sunday: Rain, mainly before 5pm. High near 42. West wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 42 °F

    Rain

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am, then a slight chance of snow between 1am and 4am. Partly cloudy, with a low around 26. West wind 7 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 26 °F

    Chance
    Rain/Snow

  • Monday

    Monday: Sunny, with a high near 37. West wind 9 to 13 mph, with gusts as high as 28 mph.

    High: 37 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29. West wind around 7 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41. Southwest wind 8 to 10 mph, with gusts as high as 21 mph.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog between 8am and noon. Patchy freezing fog before 8am. Otherwise, partly sunny, with a high near 46. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Tonight
Showers likely, mainly between 10pm and 2am. Patchy fog. Otherwise, cloudy, with a low around 37. South wind 7 to 13 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely, mainly after 5pm. Patchy fog after 4pm. Otherwise, cloudy, with a high near 45. Northwest wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain. Patchy fog before 8pm. Low around 35. East wind 3 to 6 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Rain, mainly before 5pm. High near 42. West wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before 1am, then a slight chance of snow between 1am and 4am. Partly cloudy, with a low around 26. West wind 7 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Monday
Sunny, with a high near 37. West wind 9 to 13 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 29. West wind around 7 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 41. Southwest wind 8 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 33. Southwest wind around 6 mph.
Wednesday
Mostly cloudy, with a high near 44. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of rain. Cloudy, with a low around 32. Southwest wind around 6 mph becoming north after midnight. Chance of precipitation is 40%.
Thursday
A chance of rain. Mostly cloudy, with a high near 39. North wind 6 to 9 mph. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
South Dennis MA
 41.69°N 70.16°W (Elev. 7 ft)
Last Update:
12:42 am EST Jan 9, 2026
Forecast Valid:
4am EST Jan 9, 2026-6pm EST Jan 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation